ignite-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From woo charles <ignite.charl...@gmail.com>
Subject CPU Usage on distributed queries
Date Mon, 03 Apr 2017 06:54:50 GMT
Hi,

I have conducted a test on distributed query performance.

I have created 5 server nodes(java) in 3 different server.

40000 records are entered.

I created 80 Threads and each thread looped following sql 100 times.
select * from user where age<18
(about 50 records is selected)

*** age is not key / index

After all, I have found that the CPU usage of 2 server nodes (the oldest
and the second oldest) jump to a significantly high level (from 5% to
80%-90%) where other 3 nodes increase from 5% to 18% only.

Why this happens?

Mime
View raw message